chore: add copyright headers to web lib utilities

Make per-file ownership visible on the web lib helpers, matching the root LICENSE notice.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: D240021

apps/web/src/lib/format.ts

@@ -1,3 +1,4 @@
+// Copyright (c) 2026 Sub Rosa contributors
 export function shortAddr(g: string, n = 6): string {
   if (g.length <= n * 2 + 3) return g;
   return `${g.slice(0, n)}…${g.slice(-n)}`;

apps/web/src/lib/hex.ts

@@ -1,3 +1,4 @@
+// Copyright (c) 2026 Sub Rosa contributors
 export function hexToBytes(hex: string): Uint8Array {
   const clean = hex.trim().replace(/^0x/i, "");
   if (clean.length % 2 !== 0 || !/^[0-9a-fA-F]*$/.test(clean)) {

apps/web/src/lib/round-phase.ts

@@ -1,3 +1,4 @@
+// Copyright (c) 2026 Sub Rosa contributors
 import type { RoundStatus } from "../dashboard/types";
 
 export type RoundPhase = "Open" | "Reveal" | "Settled";

apps/web/src/lib/round-status.ts

@@ -1,3 +1,4 @@
+// Copyright (c) 2026 Sub Rosa contributors
 export type BadgeState = "loading" | "empty" | "error" | "stale" | "found";
 
 export interface RoundStatusInfo {